XF 1.4 Expired License

Hello. I have an expired license for a forum I created a year ago. I would like to start a new website, and keep my old website. My question is do I need to renew my license? Can I use old license for new site? Or do I need to purchase 2 new licenses?

You can continue using your old license if you wish, but you'll be stuck with the what the latest version of XenForo was back then. If you'd like the current latest version of XenForo (1.4.7), you will need to renew your license.